package com.sky.service.admin.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.exception.*;
import com.sky.mapper.admin.EmployeeMapper;
import com.sky.pojo.Employee;
import com.sky.result.PageResult;
import com.sky.result.Result;
import com.sky.service.admin.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.util.Objects;

@Service
public class EmployeeServiceImpl  implements EmployeeService {



    @Resource
    private EmployeeMapper employeeMapper;

    /**
     * 修改员工信息
     * @param employee
     */
    @Override
    public void update(Employee employee) {

//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }


    /**
     * 根据ID查询员工信息
     *
     * @param id
     * @return
     */
    @Override
    public Result<Employee> getById(Long id) {
        // 一.校验参数
        if(Objects.isNull(id)) {
            throw new ParameterIsNullException("ID不能为空");
        }
        //二.处理业务
        Employee employee = employeeMapper.getById(id);
        if(Objects.isNull(employee)) {
            throw new EmployeeNotExistException("员工不存在");
        }else {
            //脱敏
            employee.setPassword("");
        }
        // 三.封装数据
        return Result.success(employee);
    }

    /**
     * 启用或禁用员工账号
     *
     * @param status
     * @param id
     * @return
     */
    @Override
    public Result<String> startOrStop(Integer status, Long id) {
        // 一.校验参数
        if(Objects.isNull(status)
                || Objects.isNull(id)) {
            throw new ParameterIsNullException("员工状态与ID均不能为空");
        }
        // 二.处理业务
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                .updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())
                .build();
        employeeMapper.updateStatusById(employee);
        // 三.封装数据
        return Result.success();
    }

    @Override
    public Result<PageResult> pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // 一.校验参数
        int page = employeePageQueryDTO.getPage();
        int pageSize = employeePageQueryDTO.getPageSize();
        if(page <= 0 || pageSize <= 0) {
            throw new ParamsIllegalException("分页参数非法");
        }
        // 二.处理业务
        // 1.分页设置
        PageHelper.startPage(page, pageSize);
        // 2.条件查询
        Page<Employee> empPage = employeeMapper.selectPageByName(employeePageQueryDTO.getName());
        // 三.封装数据
        PageResult pageResult = PageResult.builder()
                .total(empPage.getTotal())
                .records(empPage.getResult())
                .build();
        return Result.success(pageResult);
    }

    /**
     * 员工添加
     * @param employeeDTO
     * @return
     */
    @Override
    public Result<String> add(EmployeeDTO employeeDTO) {
        // 一.校验参数
        //判断用户名是否存在
        Employee dbEmployee = employeeMapper.getByUsername(employeeDTO.getUsername());
        if(dbEmployee!=null){
            throw new EmployeeNameExistException(dbEmployee.getName()+"已存在");
        }
        // 二.处理业务
        Employee employee = new Employee();
        //只有数据类型跟属性名都相同的情况下，才能拷贝成功
        BeanUtils.copyProperties(employeeDTO, employee);
        // 1.补全实体
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);
//        LocalDateTime now = LocalDateTime.now();
//        employee.setCreateTime(now);
//        employee.setUpdateTime(now);
//        Long empId = BaseContext.getCurrentId();
//        employee.setCreateUser(empId);
//        employee.setUpdateUser(empId);
        // 2.保存到数据库
        employeeMapper.insert(employee);
        // 三.封装数据
        return Result.success();
    }

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();//

        //1、根据用户名查询数据库中的数据  select * from employee where username = #{username}
        Employee employee = employeeMapper.getByUsername(username); //

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }
        //3、返回实体对象
        return employee;
    }



}
